GMC Sierra Classic 3500 (2007-2007) 6.0l vin u, charging circuit

8.1L ANTI-LOCK BRAKE SYSTEM AUXILIARY BATTERY RELAY (RIGHT REAR OF ENG COMPT) BATTERY BATTERY CABLE JUNCTION BLOCK (NEAR LEFT SIDE OF ENG) BATTERY NOT CHARGING BLK WIRE BLK/WHT WIRE BRN WIRE CHARGE INDICATOR CONTROL CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER INFO CENTER EXCEPT 8.1L FUSE BLOCK MOBILE RADIO (UPFITTER OPTION) FUSIBLE LINK 1 (8 GA- FUSIBLE LINK 4 (14 GA- GRAY) FUSIBLE LINK 5 (10 GA- FUSIBLE LINK 6 (10 GA- GENERATOR B+ GENERATOR FIELD DUTY CYCLE SIGNAL GROUND GRY WIRE HOT IN RUN, START I/P RELAY BLOCK (NEAR LEFT KICK PANEL) IGN 1 VOLT IGN E FUSE INSTRUMENT PANEL CLUSTER LEFT BATTERY LOGIC MEGA FUSE PNK WIRE POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT OF ENGINE COMPARTMENT) RED WIRE RIGHT BATTERY RIGHT BATTERY (W/AUX BATTERY) SEO IGN FUSE SERIAL DATA CLASS 2 STARTER UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT) VOLTS W/ SEO W/AUX BATTERY W/DUAL BATTERIES W/O SEO WRECKER OPTION